Question: What is the { start time } for { Arthur Wellesley, 1st Duke of Wellington } as { Prime Minister of the United Kingdom }?
Paraphrase: When was Arthur Wellesley, 1st Duke of Wellington, the Prime Minister of the UK?
SPARQL (Wikidata): SELECT ?value WHERE { wd:Q131691 p:P39 ?s . ?s ps:P39 wd:Q14211 . ?s pq:P580 ?value}